spAndBndConversion: Convert sp and bnd format into each other

In R2BayesX: Estimate Structured Additive Regression Models with 'BayesX'

Convert sp and bnd format into each other

Description

Convert geographical information objects of class "SpatialPolygons" (or specializations) from R-package sp to objects of class "bnd" from R-package R2BayesX and vice versa.

Usage

sp2bnd(spObject, regionNames, height2width, epsilon)
bnd2sp(bndObject)

Arguments

spObject	object of class "SpatialPolygons" (or specializations).
regionNames	character vector of region names (parallel to the Polygons list in spObject), defaults to the IDs.
height2width	ratio of total height to width, defaults to the bounding box values.
epsilon	how much can two polygons differ (in maximum squared Euclidean distance) and still match each other?, defaults to machine precision.
bndObject	object of class "bnd".

Value

Equivalent object in the other format.

Author(s)

Daniel Sabanes Bove.

See Also

nb2gra, gra2nb for conversion between the neighborhood structure formats and read.bnd, write.bnd for the interface to the R2BayesX files.

Examples

## Not run: ## bnd to sp:
file <- file.path(find.package("R2BayesX"), "examples", "Germany.bnd")
germany <- read.bnd(file)
spGermany <- bnd2sp(germany)

## plot the result together with the neighborhood graph
if(requireNamespace("spdep")) {
  library("spdep")
  plot(spGermany)
  nbGermany <- poly2nb(spGermany)
  plot(nbGermany, coords = coordinates(spGermany), add = TRUE)

  ## example with one region inside another
  spExample <- spGermany[c("7231", "7235"), ]
  plot(spExample)
  plot(poly2nb(spExample), coords = coordinates(spExample), add = TRUE)

  ## now back from sp to bnd:
  bndGermany <- sp2bnd(spGermany)
  plotmap(bndGermany)

  ## compare names and number of polygons
  stopifnot(
    identical(names(bndGermany), names(germany)),
    identical(length(bndGermany), length(germany))
  )
}
## End(Not run)

R2BayesX documentation built on April 4, 2025, 12:35 a.m.